【单选题】【消耗次数：1】
She was so _____ in her job that she didn’t hear someone knocking at the door.
①
attracted
②
drawn
③
absorbed
④
concentrated
参考答案：
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相关题目
【单选题】
The room was so quiet that she could hear the____ of her heart.
①
hitting
②
beating
③
hurting
④
striking
【单选题】
She’s an only child, but they didn’t really __________ her.
①
hurt
②
damage
③
spoil
④
harm
【单选题】
25.She ____the loud speaker so that everyone in the lecture room could hear her.
①
turnedon
②
turnedup
③
turnedoff
④
turneddown
【单选题】
She didn’ t come to the party last Sunday._____, she must
have made the party more exciting.
①
If she came
②
Would she come
③
Had she come
Did she come
【单选题】
She
doesn’t speak ____ her friend, but her written work is excellent.
①
as
well as
②
so often as
③
so
much as
④
as
good as
【单选题】
She ________ the door before she goes away.
①
had locked
②
is locking
③
has locked
④
was locking
【单选题】
She ___ the door before she goes away.
①
had locked
②
is locking
③
has locked
④
was locking
【单选题】
Our English teacher was standing ___ us so that she could hear us all clearly.
①
away from
②
far behind
③
between?
④
among
随机题目
【判断题】
设二维随机变量<img class=jc-formula data-tex=(X,Y) src=https://huaweicloudobs.ahjxjy.cn/5397F429C2F8D6C371FC104B680E7FA8.png style=vertical-align: middle;/>联合分布密度函数为:<img class=jc-formula data-tex=f(x,y)=\left\{ \begin{ matrix } k{ e }^{ -(2x+y) },x0,y0, \\ 0,其他， \end{ matrix } \right src=https://huaweicloudobs.ahjxjy.cn/5D1F623136C9C55E2DA3BF1AD4A1BD74.png style=vertical-align: middle;/>则<img class=jc-formula data-tex=k=2 src=https://huaweicloudobs.ahjxjy.cn/3E6586508093C30A8CD48505A508CDB8.png style=vertical-align: middle;/>
①
正确
②
错误
【判断题】
设二维随机变量<img class=jc-formula data-tex=(X,Y) src=https://huaweicloudobs.ahjxjy.cn/5397F429C2F8D6C371FC104B680E7FA8.png style=vertical-align: middle;/>联合分布密度函数为:<img class=jc-formula data-tex=f(x,y)=\left\{ \begin{ matrix } k{ e }^{ -(2x+y) },x0,y0, \\ 0,其他， \end{ matrix } \right src=https://huaweicloudobs.ahjxjy.cn/5D1F623136C9C55E2DA3BF1AD4A1BD74.png style=vertical-align: middle;/>则<img class=jc-formula data-tex=P(Y\le X)=\frac { 1 }{ 3 } . src=https://huaweicloudobs.ahjxjy.cn/43776E97E8288B89F779473B4F3A8972.png style=vertical-align: middle;/>
①
正确
②
错误
【简答题】
在开发大型、复杂系统工程的过程中，为了降低复杂程序，人们习惯把系统进一步划分成几个不同的[填空]。
【判断题】
设随机变量<img class=jc-formula data-tex=X,Y src=https://huaweicloudobs.ahjxjy.cn/7ADC839F5F3346E7C68A191C8BA75ADA.png style=vertical-align: middle;/>相互独立且都服从正态分布，则<img class=jc-formula data-tex=X+Y src=https://huaweicloudobs.ahjxjy.cn/5DB40891FAF3B46DDD62CE9621200191.png style=vertical-align: middle;/>也服从正态分布。
①
正确
②
错误
【简答题】
[填空]描述系统的控制结构，它是用来确定各个对象之间交互及整体的控制结构的模型。
【单选题】
UML的主要目标是，以( )的方式描述任何类型的系统，最常用于建立软件系统的模型，也可以描述非软件领域的系统。
①
结构图
②
面向对象图
③
系统流程图
④
面向过程的图